import java.util.Scanner;

public class exercise {
	public static void main(String[] args){
		System.out.print("a");
		System.out.println("a");
		int a = 1,b = 2;
		double c = 1.1,d = 2.1;
		System.out.printf("%d %d %f %f", a,b,c,d);
		Scanner sc = new Scanner(System.in);
		sc.close();
		/*while(sc.hasNext()){
			System.out.println(sc.next());
		}*/
		//System.out.println(sc.nextDouble());
		//System.out.println(sc.nextInt());
		
		}
}
